mirror of
https://git.in.rschanz.org/ryan77627/guix.git
synced 2024-11-07 15:36:20 -05:00
9e4c24ef90
Having a non-standard (different than 1) patch level requirement means the
patches cannot be composed easily from different origins. The following
command was used to remove one level from the llvm-9 patches:
sed -e 's|^--- a/|--- |' -e 's|^+++ b/|+++ |' \
gnu/packages/patches/llvm-9* -i
* gnu/packages/llvm.scm (llvm-9)[source]: Drop the patch-flags field.
Re-indent list of patches.
* gnu/packages/patches/llvm-9-fix-bitcast-miscompilation.patch: Strip one level.
* gnu/packages/patches/llvm-9-fix-lpad-miscompilation.patch: Likewise.
* gnu/packages/patches/llvm-9-fix-scev-miscompilation.patch: Likewise.
97 lines
3.5 KiB
Diff
97 lines
3.5 KiB
Diff
From 011fb5bf8b31316472fccb1a19c91912246df9b2 Mon Sep 17 00:00:00 2001
|
|
From: Reid Kleckner <rnk@google.com>
|
|
Date: Sat, 28 Mar 2020 11:03:14 -0700
|
|
Subject: [PATCH] [CodeGen] Fix sinking local values in lpads with phis
|
|
|
|
There was already a test case for landingpads to handle this case, but I
|
|
had forgotten to consider PHI instructions preceding the EH_LABEL in the
|
|
landingpad.
|
|
|
|
PR45261
|
|
---
|
|
llvm/lib/CodeGen/SelectionDAG/FastISel.cpp | 17 +++++++++-
|
|
llvm/test/CodeGen/X86/sink-local-value.ll | 36 ++++++++++++++++++++++
|
|
2 files changed, 52 insertions(+), 1 deletion(-)
|
|
|
|
diff --git a/llvm/lib/CodeGen/SelectionDAG/FastISel.cpp b/llvm/lib/CodeGen/SelectionDAG/FastISel.cpp
|
|
index 5ac3606dc662..2638b1e8a05c 100644
|
|
--- llvm/lib/CodeGen/SelectionDAG/FastISel.cpp
|
|
+++ llvm/lib/CodeGen/SelectionDAG/FastISel.cpp
|
|
@@ -225,6 +225,21 @@ static bool isRegUsedByPhiNodes(unsigned DefReg,
|
|
return false;
|
|
}
|
|
|
|
+static bool isTerminatingEHLabel(MachineBasicBlock *MBB, MachineInstr &MI) {
|
|
+ // Ignore non-EH labels.
|
|
+ if (!MI.isEHLabel())
|
|
+ return false;
|
|
+
|
|
+ // Any EH label outside a landing pad must be for an invoke. Consider it a
|
|
+ // terminator.
|
|
+ if (!MBB->isEHPad())
|
|
+ return true;
|
|
+
|
|
+ // If this is a landingpad, the first non-phi instruction will be an EH_LABEL.
|
|
+ // Don't consider that label to be a terminator.
|
|
+ return MI.getIterator() != MBB->getFirstNonPHI();
|
|
+}
|
|
+
|
|
/// Build a map of instruction orders. Return the first terminator and its
|
|
/// order. Consider EH_LABEL instructions to be terminators as well, since local
|
|
/// values for phis after invokes must be materialized before the call.
|
|
@@ -233,7 +248,7 @@ void FastISel::InstOrderMap::initialize(
|
|
unsigned Order = 0;
|
|
for (MachineInstr &I : *MBB) {
|
|
if (!FirstTerminator &&
|
|
- (I.isTerminator() || (I.isEHLabel() && &I != &MBB->front()))) {
|
|
+ (I.isTerminator() || isTerminatingEHLabel(MBB, I))) {
|
|
FirstTerminator = &I;
|
|
FirstTerminatorOrder = Order;
|
|
}
|
|
diff --git a/llvm/test/CodeGen/X86/sink-local-value.ll b/llvm/test/CodeGen/X86/sink-local-value.ll
|
|
index b0e511ac1189..f7d861ac9b6c 100644
|
|
--- llvm/test/CodeGen/X86/sink-local-value.ll
|
|
+++ llvm/test/CodeGen/X86/sink-local-value.ll
|
|
@@ -145,6 +145,42 @@ try.cont: ; preds = %entry, %lpad
|
|
; CHECK: retl
|
|
|
|
|
|
+define i32 @lpad_phi() personality i32 (...)* @__gxx_personality_v0 {
|
|
+entry:
|
|
+ store i32 42, i32* @sink_across
|
|
+ invoke void @may_throw()
|
|
+ to label %try.cont unwind label %lpad
|
|
+
|
|
+lpad: ; preds = %entry
|
|
+ %p = phi i32 [ 11, %entry ] ; Trivial, but -O0 keeps it
|
|
+ %0 = landingpad { i8*, i32 }
|
|
+ catch i8* null
|
|
+ store i32 %p, i32* @sink_across
|
|
+ br label %try.cont
|
|
+
|
|
+try.cont: ; preds = %entry, %lpad
|
|
+ %r.0 = phi i32 [ 13, %entry ], [ 55, %lpad ]
|
|
+ ret i32 %r.0
|
|
+}
|
|
+
|
|
+; The constant materialization should be *after* the stores to sink_across, but
|
|
+; before any EH_LABEL.
|
|
+
|
|
+; CHECK-LABEL: lpad_phi:
|
|
+; CHECK: movl $42, sink_across
|
|
+; CHECK: movl $13, %{{[a-z]*}}
|
|
+; CHECK: .Ltmp{{.*}}:
|
|
+; CHECK: calll may_throw
|
|
+; CHECK: .Ltmp{{.*}}:
|
|
+; CHECK: jmp .LBB{{.*}}
|
|
+; CHECK: .LBB{{.*}}: # %lpad
|
|
+; CHECK-NEXT: .Ltmp{{.*}}:
|
|
+; CHECK: movl {{.*}}, sink_across
|
|
+; CHECK: movl $55, %{{[a-z]*}}
|
|
+; CHECK: .LBB{{.*}}: # %try.cont
|
|
+; CHECK: retl
|
|
+
|
|
+
|
|
; Function Attrs: nounwind readnone speculatable
|
|
declare void @llvm.dbg.value(metadata, metadata, metadata) #0
|
|
|